Plumbing is one that's going to depend on cost. I have no idea how much it will add given that the garage/shop is going up in the backyard where there's not plumbing already.

Someone asked how much I'll really be using it. Well, given that I don't have a perpetual honeydo list, I spend a lot of evenings putzing around on bikes. It's rare for me not to have some kind of project going with one of mine or Wifey's bikes. So, I need the space. Plus, it's going to be a multipurpose shop as time goes on. Hub for car maintenance and the like, plus home to pretty much anything else I find myself doing involving tools. And owning a home lends itself to such projects. So I'll spend a decent amount of time there.

I've got a good Craftsman toolchest on wheels. Right now, all tools are in it, but a pegboard will go up in the new shop and open up a lot of room in the chest for better organization. I've got spare parts in the lowest two drawers and they're a little tight. I like the idea of having some shelving somewhere for stuff like that.

Looking at LBS and trying to scale it for a home shop is tough, hence my query here to folks with home shops.

It's also gonna be the home base for car projects and maintenance. The garage itself needs good lighting, and certainly the shop does. Hadn't thought of that in exact terms.

What I have in my head is a 12' by 12'-ish space with a bench on one side and a stand (probably folding, maybe anchored) on the other with bikes on a wall between. How high I can go depends on the aesthetics of the roofline. I don't need to get all of the bikes in the shop, but I'd like to get 2-4 on a wall or up high. If that won't work, then the oversized garage gets more. I'll have a pegboard up above a work bench, where I'll anchor a table vice. Hadn't thought about keeping the depth so that I can reach the pegboard. Good call there. LBS I worked in outlined their tool positions on the pegboard, makes sense. Separate wheel station seems like a good idea as well, given that the workbench isn't going to be gargantuan. I need to draw it out, but I'm seeing a standing workbench and a sitting workbench along one wall. The standing will have the vice and be separate from the sitting, which will basically be the truing and wheelbuild station. Pegboard all along the side. Toolchest on the opposite wall, protable stand there or in the center. Probably a sink at either end of the bench but again that depends on the cost of running plumbing in. Bathroom sounds nice, but we don't have the space in the yard to make this thing big enough for that. It's a really deep yard, but we want to have some of it left after this goes in. Eventually, my goal's to put a very small flat panel in it somewhere (not 2", but small nonetheless). If we redo our entertainment system in the next couple of years I'll take the bookshelf speakers, receiver and CD changer that we have now and put them in the shop. In the meantime, a boombox will be fine. It doesn't have to be perfect from the start, especially in terms of accessories like electronics.

Thanks for the suggestions, keep 'em coming.